test/builtins/Unit/addtf3_test.c

// RUN: %clang_builtins %s %librt -o %t && %run %t
//===--------------- addtf3_test.c - Test __addtf3 ------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file tests __addtf3 for the compiler_rt library.
//
//===----------------------------------------------------------------------===//

#include <fenv.h>
#include <stdio.h>

#if __LDBL_MANT_DIG__ == 113

#include "int_lib.h"
#include "fp_test.h"

// Returns: a + b
COMPILER_RT_ABI long double __addtf3(long double a, long double b);

int test__addtf3(long double a, long double b,
                 uint64_t expectedHi, uint64_t expectedLo)
{
    long double x = __addtf3(a, b);
    int ret = compareResultLD(x, expectedHi, expectedLo);

    if (ret){
        printf("error in test__addtf3(%.20Lf, %.20Lf) = %.20Lf, "
               "expected %.20Lf\n", a, b, x,
               fromRep128(expectedHi, expectedLo));
    }

    return ret;
}

char assumption_1[sizeof(long double) * CHAR_BIT == 128] = {0};

#endif

int main()
{
#if __LDBL_MANT_DIG__ == 113
    // qNaN + any = qNaN
    if (test__addtf3(makeQNaN128(),
                     0x1.23456789abcdefp+5L,
                     UINT64_C(0x7fff800000000000),
                     UINT64_C(0x0)))
        return 1;
    // NaN + any = NaN
    if (test__addtf3(makeNaN128(UINT64_C(0x800030000000)),
                     0x1.23456789abcdefp+5L,
                     UINT64_C(0x7fff800000000000),
                     UINT64_C(0x0)))
        return 1;
    // inf + inf = inf
    if (test__addtf3(makeInf128(),
                     makeInf128(),
                     UINT64_C(0x7fff000000000000),
                     UINT64_C(0x0)))
        return 1;
    // inf + any = inf
    if (test__addtf3(makeInf128(),
                     0x1.2335653452436234723489432abcdefp+5L,
                     UINT64_C(0x7fff000000000000),
                     UINT64_C(0x0)))
        return 1;
    // any + any
    if (test__addtf3(0x1.23456734245345543849abcdefp+5L,
                     0x1.edcba52449872455634654321fp-1L,
                     UINT64_C(0x40042afc95c8b579),
                     UINT64_C(0x61e58dd6c51eb77c)))
        return 1;

#if (defined(__arm__) || defined(__aarch64__)) && defined(__ARM_FP)
    // Rounding mode tests on supported architectures
    const long double m = 1234.0L, n = 0.01L;

    fesetround(FE_UPWARD);
    if (test__addtf3(m, n,
                     UINT64_C(0x40093480a3d70a3d),
                     UINT64_C(0x70a3d70a3d70a3d8)))
        return 1;

    fesetround(FE_DOWNWARD);
    if (test__addtf3(m, n,
                     UINT64_C(0x40093480a3d70a3d),
                     UINT64_C(0x70a3d70a3d70a3d7)))
        return 1;


    fesetround(FE_TOWARDZERO);
    if (test__addtf3(m, n,
                     UINT64_C(0x40093480a3d70a3d),
                     UINT64_C(0x70a3d70a3d70a3d7)))
        return 1;

    fesetround(FE_TONEAREST);
    if (test__addtf3(m, n,
                     UINT64_C(0x40093480a3d70a3d),
                     UINT64_C(0x70a3d70a3d70a3d7)))
        return 1;
#endif

#else
    printf("skipped\n");

#endif
    return 0;
}